hid-generic 0000:0000:0000.2602: unknown main item tag 0x0
hid-generic 0000:0000:0000.2602: unknown main item tag 0x0
hid-generic 0000:0000:0000.2602: unknown main item tag 0x0
hid-generic 0000:0000:0000.2602: unknown main item tag 0x0
hid-generic 0000:0000:0000.2602: hidraw0: <UNKNOWN> HID v0.00 Device [syz0] on syz0
INFO: task init:2503 blocked for more than 140 seconds.
      Not tainted 4.9.181+ #7
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
init            D28056  2503      1 0x00000000
 0000000000000087 ffff8801d3ca97c0 ffff8801d3841600 ffff8801db721000
 ffff8801c8065f00 ffff8801db721018 ffff8801d308f758 ffffffff82809dbe
 ffff8801d3caa088 ffff8801d3caa060 00ff8801d3caa090 ffff8801db7218f0
Call Trace:
 [<0000000007578da5>] schedule+0x92/0x1c0 kernel/sched/core.c:3546
 [<00000000a4c54248>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3579
 [<00000000fce75a71>] __mutex_lock_common kernel/locking/mutex.c:582 [inline]
 [<00000000fce75a71>] mutex_lock_nested+0x38d/0x920 kernel/locking/mutex.c:621
 [<00000000c1f703d1>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline]
 [<00000000c1f703d1>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140
 [<0000000043e89fcf>] chrdev_open+0x230/0x630 fs/char_dev.c:398
 [<000000003e01b9fa>] do_dentry_open+0x422/0xd20 fs/open.c:772
 [<00000000d119b44d>] vfs_open+0x105/0x230 fs/open.c:885
 [<000000007fb94431>] do_last fs/namei.c:3457 [inline]
 [<000000007fb94431>] path_openat+0xbf5/0x2f60 fs/namei.c:3581
 [<00000000ba0ed60e>] do_filp_open+0x1a1/0x280 fs/namei.c:3615
 [<0000000072c98783>] do_sys_open+0x2f0/0x610 fs/open.c:1078
 [<00000000502de1aa>] SYSC_open fs/open.c:1096 [inline]
 [<00000000502de1aa>] SyS_open+0x2d/0x40 fs/open.c:1091
 [<000000001568718a>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288
 [<00000000c3300da9>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb

Showing all locks held in the system:
2 locks held by khungtaskd/24:
 #0:  (rcu_read_lock){......}, at: [<000000004745c944>] check_hung_uninterruptible_tasks kernel/hung_task.c:169 [inline]
 #0:  (rcu_read_lock){......}, at: [<000000004745c944>] watchdog+0x14b/0xaf0 kernel/hung_task.c:263
 #1:  (tasklist_lock){.+.+..}, at: [<00000000fef4196b>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4336
1 lock held by rsyslogd/1910:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<00000000517cec22>] __fdget_pos+0xa8/0xd0 fs/file.c:782
2 locks held by getty/2037:
 #0:  (&tty->ldisc_sem){++++++}, at: [<0000000072410384>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
 #1:  (&ldata->atomic_read_lock){+.+...}, at: [<00000000081d6b9f>] n_tty_read+0x1fe/0x1820 drivers/tty/n_tty.c:2156
1 lock held by init/2503:
 #0:  (tty_mutex){+.+.+.}, at: [<00000000c1f703d1>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<00000000c1f703d1>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140
1 lock held by init/2504:
 #0:  (tty_mutex){+.+.+.}, at: [<00000000c1f703d1>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<00000000c1f703d1>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140
1 lock held by init/2505:
 #0:  (tty_mutex){+.+.+.}, at: [<00000000c1f703d1>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<00000000c1f703d1>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140
1 lock held by init/2506:
 #0:  (tty_mutex){+.+.+.}, at: [<00000000c1f703d1>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<00000000c1f703d1>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140
1 lock held by init/2507:
 #0:  (tty_mutex){+.+.+.}, at: [<00000000c1f703d1>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<00000000c1f703d1>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 24 Comm: khungtaskd Not tainted 4.9.181+ #7
 ffff8801d98d7cc8 ffffffff81b57db1 0000000000000000 0000000000000000
 0000000000000000 ffffffff81099901 dffffc0000000000 ffff8801d98d7d00
 ffffffff81b6304c 0000000000000000 0000000000000000 0000000000000000
Call Trace:
 [<00000000f6f5d2ec>] __dump_stack lib/dump_stack.c:15 [inline]
 [<00000000f6f5d2ec>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<0000000041a4a4a9>] nmi_cpu_backtrace.cold+0x47/0x87 lib/nmi_backtrace.c:99
 [<00000000b698ec9c>] nmi_trigger_cpumask_backtrace+0x124/0x155 lib/nmi_backtrace.c:60
 [<0000000071f1a86c>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<00000000f18ac0a7>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<00000000f18ac0a7>] check_hung_task kernel/hung_task.c:126 [inline]
 [<00000000f18ac0a7>] check_hung_uninterruptible_tasks kernel/hung_task.c:183 [inline]
 [<00000000f18ac0a7>] watchdog+0x670/0xaf0 kernel/hung_task.c:263
 [<00000000ce17911d>] kthread+0x278/0x310 kernel/kthread.c:211
 [<0000000049972add>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 21642 Comm: syz-executor444 Not tainted 4.9.181+ #7
task: 00000000789f1c31 task.stack: 0000000011c7c942
RIP: 0010:[<ffffffff81247f2a>] 
c [<000000005474bfe3>] debug_lockdep_rcu_enabled.part.0+0x2a/0x60 kernel/rcu/update.c:265
RSP: 0000:ffff8801c67e7a40  EFLAGS: 00000a03
RAX: dffffc0000000000 RBX: ffff8801d80e17c0 RCX: 1ffffffff063fad0
RDX: 0000000000000000 RSI: 00000000006cb090 RDI: ffff8801d80e206c
RBP: ffff8801c67e7a48 R08: 0000000000000001 R09: 0000000000002536
R10: ffff8801d80e2098 R11: 0000000000000001 R12: 00000000006cc090
R13: 00000000006cb090 R14: ffff8801d2eb9080 R15: 0000000000000001
FS:  00000000010a2880(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000006cb090 CR3: 00000001c93b3000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 00000000006cc090
c ffff8801c67e7a58
c ffffffff81247fd1
c ffff8801c67e7aa0
c
 ffffffff810c5c84
c ffff880100000000
c ffff880100000000
c ffff8801d2eb9080
c
 00000000006cb090
c 80000001d0486045
c ffff8801c70bad20
c ffff8801c70bad60
c
Call Trace:
 [<00000000e7d073c1>] debug_lockdep_rcu_enabled+0x71/0xa0 kernel/rcu/update.c:264
 [<000000000799ea53>] trace_tlb_flush include/trace/events/tlb.h:37 [inline]
 [<000000000799ea53>] flush_tlb_mm_range+0x214/0x460 arch/x86/mm/tlb.c:465
 [<000000003d9bdbfb>] flush_tlb_page arch/x86/include/asm/tlbflush.h:304 [inline]
 [<000000003d9bdbfb>] ptep_clear_flush+0xe7/0x120 mm/pgtable-generic.c:80
 [<0000000069332290>] wp_page_copy+0x910/0x1470 mm/memory.c:2206
 [<00000000a832e878>] do_wp_page+0x2a6/0x20a0 mm/memory.c:2439
 [<00000000984f21c3>] handle_pte_fault mm/memory.c:3562 [inline]
 [<00000000984f21c3>] __handle_mm_fault mm/memory.c:3634 [inline]
 [<00000000984f21c3>] handle_mm_fault+0xeff/0x2420 mm/memory.c:3671
 [<0000000020756469>] __do_page_fault+0x3f0/0xa60 arch/x86/mm/fault.c:1404
 [<00000000ab4aa66d>] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1467
 [<00000000bfcd3a4b>] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:953
Code: 
c90 
c48 
cb8 
c00 
c00 
c00 
c00 
c00 
cfc 
cff 
cdf 
c55 
c48 
c89 
ce5 
c53 
c65 
c48 
c8b 
c1c 
c25 
c00 
c7e 
c01 
c00 
c48 
c8d 
cbb 
cac 
c08 
c00 
c00 
c48 
c89 
cfa 
c48 
cc1 
cea 
c03 
c0f 
cb6 
c14 
c02 
c<48> 
c89 
cf8 
c83 
ce0 
c07 
c83 
cc0 
c03 
c38 
cd0 
c7c 
c04 
c84 
cd2 
c75 
c10 
c8b 
c93 
cac 
c08 
c